Printing roller convenient to replace

The utility model belongs to the technical field of printing machine equipment, and particularly relates to a printing roller convenient to replace, which comprises a bottom plate. Fixing bases are installed on the top side of the bottom plate, holes are formed in the middles of the fixing bases, bearings are arranged in the holes in a sleeved mode, a printing roller body is installed between the two fixing bases, a first rotating shaft is fixedly connected to one end of the printing roller body, and a rotating fixing assembly is installed on the first rotating shaft. A rotary fixing assembly is installed at one end of the printing roller body, a telescopic fixing assembly is installed at the other end of the printing roller body, the rotary fixing assembly comprises a first rotating shaft, a first circular groove is formed in the first rotating shaft, three first grooves are formed in the outer side of the first rotating shaft, a sliding block is installed in the first circular groove, and three arc-shaped s